<template>
    <div class='list' ref='wrapper'>
        <div>
            <div class="area">
                <div class="title border-topbottom">当前城市</div>
                <div class="button-list">
                    <div class="button-wrapper">
                        <div class="button">
                            {{this.currentCity}}
                        </div>
                    </div>
                </div>
            </div>
            <div class="area">
                <div class="title border-topbottom">热门城市</div>
                <div class="button-list">
                   <div 
                        class="button-wrapper" 
                        v-for='item of hot' 
                        :key='item.id'
                        @click='handleCityClick(item.name)'
                    >
                        <div class="button">
                            {{item.name}}
                        </div>
                    </div>
                </div>
            </div>
            <div 
                class="area" 
                v-for='(item , key) of cities' 
                :key='key'
                :ref='key' 
            >
                <div class="title border-topbottom">{{key}}</div>
                <div class="item-list">
                    <div 
                        class="item border-bottom" 
                        v-for='innerItem of item' 
                        :key='innerItem.id'
                        @click='handleCityClick(innerItem.name)'
                    >
                        {{innerItem.name}}
                    </div>
                </div>
            </div>
        </div>
    </div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapState } from 'vuex'
export default {
    name: 'CityList',
    props:{
        hot: Array,
        cities: Object,
        letter: String
    },
    computed:{
        ...mapState({
            currentCity: 'city'
        })
    },
    methods: {
        handleCityClick(city){
            this.$store.dispatch('changeCity',city)
            this.$router.push('/')
            // alert(city)
        }
    },  
    watch: {
        letter () {
            // console.log(this.letter)
            if (this.letter) {
                const element = this.$refs[this.letter][0]
                // console.log(element)
                this.scroll.scrollToElement(element)
            }
        }
    },
    mounted () {
        // this.scroll = new Bscroll(this.$refs.wrapper)
        this.scroll = new Bscroll('.list',{click: true})
    }
}
</script>

<style lang='stylus' scoped>
    .border-topbottom
        &:before
            border-color: #ccc
        &:after
            border-color: #ccc
    .border-bottom
        &:before
            border-color: #ccc
    .list
        overflow hidden
        position absolute
        left 0
        right 0
        top 1.58rem
        bottom 0
        .title
            line-height .54rem
            background #eee
            padding-left .2rem
            color #666
            font-size .26rem
        .button-list
            overflow hidden
            padding .1rem .6rem .1rem .1rem
            .button-wrapper
                width 33.33%
                float left
                .button
                    text-align center
                    margin .1rem
                    border: .02rem solid #ccc
                    padding .1rem 0
                    border-radius .06rem
        .item-list
            .item
                line-height .76rem
                color #666
                padding-left .2rem

</style>
